Mini Cooling Clip Fan 360 Degree Rotation USB or 18650 Battery Rechargeable Powered Portable Mute Computer External Desktop Fan PC Cooler (Blue) Unique design, creative style, made of high-quality ABS, has a solid structure and pressure-resistant. Safe to us. The advanced power management technology provides a variety of power supply. Use USB directly or battery- powered. With clip on the bottom, can be use in anywhere you want. The middle part and the blades can rotate by 360 degrees without dead ends. Be free to turn down or turn up air volume with the stepless speed technology. Efficient power and conversion circuitry can minimize the loss to save energy and protect environment. Double-sided layout and SMT manufacturing process make the performance more stable and reliable. 18650 international standard high-capacity battery provides long life and strong power output. 360 Degree Rotation USB or 18650 Battery Powered Portable Fan